When? Well when a customer ask for it, lol! Sorry for the giggle but very true! Me personally don't really care what the shape of the head is and I think the weight is more important than the shape, but that's just me.
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Peak Vise Dealer
Tying Materials, Chenille and Hackle For Pictures of my Crystal, Nylon/Rayon or
New Age Chenille Please PM Me! Also I
have the Saltwater Neck Hackle and some
colors of Marabou plus other things!